Figure 5.

Brainstem FFR and cortical ERP results with the control group split by median age (control analysis). Otherwise, as in Figure 4, c and d. In contrast to the substantial MCI versus control differences observed in FFRs, both brainstem (a) and cortical (b) responses were indistinguishable when comparing the oldest and youngest of the cognitively normal listeners. Absent effects in both brainstem and cortical ERPs confirms that the MCI-related changes that we find in speech processing are not due to aging alone.